High-voltage tube socket



Sept.23, 1947. s. M. DEL CA'MP 2,427,991

HIGH VOLTAGE TUBESOCKET Filed July 27, 1943 2 Sheets-Sheet 1 Jci n'oize M D82 @7317).

Sept. 23, 1947. i 5.. M. DEL CAMP 2,427,991 I VHIGH VOLTAGE TUBE SOCKET Filed July 27, 194:5 2 Sheets-Sheet 2 Jci zbneM'DZCawara/p.

3% WWW I Patente d Sept. 23, 1947 IiTE D- STAT E S PATENT OF Fl CE,

HIGHrVQLTAGE TUBE'SOCKJE'I.

Scipi'one-M..Del Camp, Maywood', 111., assignor to CinckManufacturingGorporation, Chicago, 11]., a corporation-oflllinois Applicationluly 27, 1943, Serial No. 496,360.

3 Claims. 1 The present invention relates to electrical sockets for mounting electrical tubes and; like appliances and aims generally to improve existing sockets of that type.

'More particularly the invention aims to improve the construction of sockets for tubes and the like requiring high voltages, such as cathode ray tubes, by the provision of a socket member constructed of lowloss dielectric material, completely encasing the contact springs and wiring terminals in such a way as to withstand high voltages between adjacent pins and between any pin and the grounded chassis support.

A further aim and advantage of the invention is the provision of a tube socket having the above described advantages but confined to-a diameter substantially equal to the diameter of the tube base.

Other aims and advantages of the invention will be apparent to those skilled in the art from a consideration of the following more detailed description thereof, reference being had to the accompanying drawings illustrating one preferred construction embodying the invention:

In the drawings:

Fig. 1 is a top plan view of the improved socket attached to a support;

Fig. 2 is a sectional elevation taken on the line 2-2 of Fig. 1;

Fig. 3 is a bottom plan view of the socket per Fig. 4 is a top plan of the socket part without the mounting;

Fig. 5' is a sectional elevation of the upper part only of the socket taken on the line 5-5 of Fig. 4;

Fig. 6 isabottom plan view thereof;

Fig. 7 is an enlarged detail sectional view of the upper part of the socket as taken on the line '|'l of Fig. 4;

Fig. 8 is a top plan view of the bottom or cover part of the socket;

Fig. 9 is a sectional elevation, the line 9-9 of Fig. 8;

Fig. 10 is a bottom plan view thereof; and

Fig. 11 is a sectional view as taken on the line H-ll of Fig. 10.

Referring to the drawings, the tube socket of the present invention preferably is of two-part construction comprising a socket body part I and a cover or plug part ;2 adapted to be secured together, and so constructed as to completely houseand encase the contact springs and wiring terminals. Preferably these parts I and 2 are of molded construction of any suitable low loss dithereof taken on electric material such as phenol condensation products and the like.

According to the invention, the socket part I (see Figs; 2-, 4, 5-, 6 and?) may comprise a substantially cylindrical body portion 3 of suitable diameter preferably to conform to the diameter of the-base T of the tube to be mounted on the socket-and formed with a central aperture 4 having a keyway 5 opening therein. The body portion 3 is advantageously provided with, annular series of openings 6 for mounting the contact springs "l and preferably these openings 6 may be in the form of cylindrical wells opening to the upper face of the socket body 3 witha flared end}; The lower or, inner ends of the wells terminate short of the bottom of the body (see Fig. 7) providing a well bottom 9 having an elongated restricted aperture Ill-at one side thereof for the passage of the wiring terminal portion H of the contact springs l. Preferably one face of the aperture H! is in alignment with an inner wall of'the wall opening 6 as shown in Fig. 7.

The socket part I is provided with a depending peripheral flange or skirt l2 extending substantially below the bottom of the body 3, said skirt being of slightly less diameter than the body I so as. to provide a shoulder [3 adjacent the plane of the bottom of the body 3. The outer face of the body 3 of the socket member I is formed. with a plurality of longitudinal recesses or grooves l4 extending from the upper end thereof and terminating short ofv the shoulder l3 (Figs. 1 and '5).

A cover or plug. part 2 is adapted to be fitted within the flange or skirt l2 and secured to the body I by suitable means, as for example by bolts [5 passed through registering apertures it of the socket body and apertures I! of the plug body. The plug part 2 is formed with a circular series of apertures l8; corresponding in number and spacing to the openings 6 of the socket body 3, These openings l8 are designed to receive the Wiring terminals H of the contact spring 1 so that the contact springs, wiring terminals and the connected conductor ends 19 will be completely enclosed by the socket parts. The apertures .18 are preferably of a diameter sufficient to receive snugly an insulated conductor l9 so that all bare-metal connections will be confined within the socket.

In sockets of the above described type for use with cathode ray and like high voltage tubes, not only is it desirable to completely encase the metal contact parts and connectors, as above described, but also to prevent voltage loss or leakage between adjacent socket contacts or between adjacent wiring terminals. According to the invention this is accomplished by serrating the comating edges of the socket parts I and 2 as at 20 so as to divide the co-mating surfaces into an undulating or zig-zag surface havin portions lying in different planes. Thus the socket is of such character as to withstand leakage of voltage between contacts up to 3000 volts.

The present invention provides a novel mount ing for the socket to connect it to the chassis or other support so as to be angularly adjustable for service connection. In the illustrated embodiment the support or chassis 25 is formed with an aperture 26 of a size to permit passage of the skirt l2 of the socket but to prevent passage of the body portion 1, so that the socket is supported by the flange or shoulders l3.

An attaching or mounting plate 27 is formed With an opening 28 to receive the upper body portion I of the socket and is also formed with inwardly extending radial lugs or keys 29, the inner ends of which are disposed above the plane of plate 21 and inwardly of the edge of the aperture 28. These lugs or keys are adapted to be slipped or seated in the grooves I 4 and serve to secure the socket member against rotation relative to the plate 21 as well as against axial displacement relative to the support 25 when the plate 2'! is secured thereto.

The plate 21 may be secured to the support 25 by means of fastenings such as screws 30 (Fig. 2) passed through elongated arcuate slots 3| in the plate so as to permit of limited angular adjustment of the socket relative to the support, so as to facilitate connection of the conductor ends 19 to the wiring terminal l l.

The novel mounting above described together with the provision of the skirt l2 surrounding the terminal encasing plug part 2 provides a simply constructed socket memberhighly adapted for use with high voltage tubes, such as cathode ray tubes, which are required to withstand a voltage of approximately 5000 volts between any tube prong or connection therewith and a grounded chassis support 25.

Although I have illustrated and described a preferred form of my invention, I do not wish to be limited thereby because the scope of my invention is best defined by the following claims.

I claim:

1. A tube socket for electrical tubes having prongs projecting from the base thereof, said socket comprising a body of insulating material formed with a series of tube prong-receiving openings, individual contact sockets mounted in said openings and formed with a wiring terminal projecting beyond said openings, a depending annular skirt on said socket body extending below the end of said wiring terminals, a second insulating member adapted to fit within the skirt and formed with a series of openings each adapted to receive and house one of said wiring terminals, means at the co-mating surfaces of said insulating members between adjacent terminals acting as a barrier against voltage loss therebetween.

2. A tube socket for electrical tubes having prongs projecting from the base end thereof, said socket comprising a body of low loss dielectric material and formed with a central opening and an annular series of tube prong-receiving openings, a metal contact for each prong-receiving opening and including a barrel portion mounted in said prong-receiving opening and a wiring terminal extending beyond said openings, said socket body bein formed with an outer peripheral skirt depending below the end of said wiring terminal, a second body of insulating material of a diameter to fit within said skirt and formed with an annular series of conductor-receiving openings extending therethrough, the walls of said last named openings adapted to completely encase the protruding end of said wiring terminals and con-- ductors connected thereto, interengaging means for reducing voltage loss between adjacent terminals along the co-mating edges of said two insulating bodies and means for securing said bodies together.

3. A tube socket for electrical tubes having prongs projecting from the base end thereof, said socket comprising a body of low loss dielectric material and formed with a central opening and an annular series of tube prong-receiving openings, a metal contact for each prong-receiving opening and including a barrel portion mounted in said prong-receiving opening and a wiring terminal extending below the bottom end of said prong-receiving opening, said socket body being formed with an outer peripheral skirt depending below the end of said wiring terminal, a second body of insulating material of a diameter to fit within said skirt and formed with an annular series of conductor-receiving openings extending therethrough, the walls of said last named openings adapted to completely encase the protruding end of said wiring terminals and conductors connected thereto, the co-mating edges of said two socket bodies between adjacent terminals being interlocked and having portions lying in difierent planes to reduce voltage loss between said terminals and means for securing said bodies together.

SCIPIONE M. DEL CAMP.

REFERENCES CITED The following references file of this patent:

UNITED STATES PATENTS are of record in the 

